Across
- 2. ,400 bird species,150 butterfly species
- 6. Elevated plateaus of rock and stone.
- 8. flat barren plains
- 9. grassland cover more than 13 million square
Down
- 1. highlands, began to risn 75 million years ago
- 3. The world's largest HOT desert.
- 4. Plains of sand and gravel.
- 5. Made by fresh water in arid regions.
- 7. coast,stretch about 2,900 kilometer
- 10. The longest river in the world.